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Consequently, a key consideration for flying an altimeter in your rocket is providing for a way for the air pressure outside the model to be accurately "seen" by your altimeter with little time lag. Based on the experience from my NAR R&D project and several hundred other model rocket flights carrying one or more altimeters, I can say that for the most part, it's not hard to get "good enough" venting for your altimeter. For most any model-rocket-sized volume flying at a realistic model rocket speed, it doesn't take a large amount of vent area and altimeters are really pretty forgiving about this. His interest in testing and comparing with data immediately led him to start flying altimeters in his rockets, beginning by flying devices made for model airplanes as rocket altimeters. [Extracted from the article]

Features several motor batteries for a variety of electric-powered model airplanes. Capacity; Diameter; Cell range; Maximum continuous current; Dimensions; Setup method; Retail price; Advertised weight; Speed 400 motors and gearboxes; Speed controls for small electrics. INSETS: Charging small cells, by Larry Marshall.;Want some more power?.

Features electric motors for model airplanes. Specifications; Tests.

Introduces AXI External Rotor Brushless Motor manufactured by Model Motors Ltd. Features of the motor; Dimension of the motor; Pros and cons; Cost of the motor.

Presents several equipment and supplies for airplanes. Specification of Z-bend pliers from Radical RC; Features of isl 6-330d charger from Schulze; Usability of Porta-Board, a flat building board from Retrop Industries.

Features the Berg-4*DSP, a micro stamp receiver for model airplane manufactured by R/C Direct. Design; Quality; Contact information.